Typical operating characteristics (continued) – Rainbow Electronics MAX15038 User Manual
Page 6
MAX15038
4A, 2MHz Step-Down Regulator
with Integrated Switches
6
_______________________________________________________________________________________
Typical Operating Characteristics (continued)
(Typical values are V
IN
= V
EN
= 5V, V
OUT
= 1.8V, R
FREQ
= 49.9k
Ω, I
OUT
= 4A, T
A
= +25°C, circuit of Figure 1, unless otherwise noted.)
LOAD TRANSIENT
MAX15038 toc06
40
µs/div
V
OUT
AC-COUPLED
100mV/div
2A
I
OUT
0A
SWITCHING WAVEFORMS
(FORCED PWM, 2A LOAD)
MAX15038 toc07
400ns/div
AC-COUPLED
50mV/div
V
OUT
I
LX
V
LX
2A/div
0A
5V/div
SWITCHING WAVEFORMS
(SKIP MODE, NO LOAD)
MAX15038 toc08
2
µs/div
AC-COUPLED
100mV/div
V
OUT
I
LX
V
LX
1A/div
0A
0V
5V/div
SOFT-START WAVEFORM
(R
LOAD
= 0.5
Ω)
MAX15038 toc09
400
µs/div
V
EN
5V/div
0V
V
OUT
1V/div
SHUTDOWN WAVEFORM
(R
LOAD
= 0.5
Ω)
MAX15038 toc10
10
µs/div
V
EN
5V/div
0V
V
OUT
1V/div
INPUT SHUTDOWN CURRENT
vs. INPUT VOLTAGE
MAX15038 toc11
INPUT VOLTAGE (V)
INPUT SHUTDOWN CURRENT (
µ
A)
5.0
4.5
4.0
3.5
3.0
6
7
8
9
10
11
12
5
2.5
5.5
V
EN
= 0V
MAXIMUM OUTPUT CURRENT
vs. OUTPUT VOLTAGE
MAX15038 toc12
OUTPUT VOLTAGE (V)
MAXIMUM OUTPUT CURRENT (A)
2.0
1.5
1.0
3
4
5
6
7
8
9
10
2
0.5
2.5